# A="I’m "
# B="OK"
# print(A+B )

# n = 123
# f = 456.789
# s1 = 'Hello, world'
# s2 = 'hello, \'Adam\''
# s3 = r'Hello, "Bart"'
# s4 = r'''Hello.Lisa!'''
# print(s1+s2)

# import math
# a =math.copysign(6,-1)
# print(a)
